Thunderchild
Rumble, rumble.
If you're wanting to run pod type filters on a CV type carb, you know all the hassles of getting it jetted right all the way through the throttle range. I've done lots of forum searching on threads pertaining to the subject. Most everyone says keep the stock airbox.
Well, when I did my cb400T1 build I wanted to get rid of the stock airbox for purely aesthetic reasons. The huge airbox just didn't fit in with my visions of the bike.
This will work with the Uni type foam filters only. Not sure what you can do with the K&N type metal mesh filters...
The idea is to restrict the airflow back down to where it was with the stock airbox; keeping the air/fuel ratio the same as it was. Here's what I did...
I cut up some 16oz beer cans and made a round 'sleeve' to go inside the UNI foam filter. You can mess with the length to get the A/F ratio right. Just stick the aluminum sleeve inside the UNI pod filter and keep trimming the length until you get it right.
My first try, I was running way too rich -not enough air. I just kept trimming a little of the length off until it ran right.
I wasn't looking for a performance increase with the filters, and I didn't want to get into jetting the carbs. I mess with that enough on my dirt bikes. I just wanted a quick and dirty way to get the A/F mixture right. Some might call it 'ghetto', but it worked for me.
Well, when I did my cb400T1 build I wanted to get rid of the stock airbox for purely aesthetic reasons. The huge airbox just didn't fit in with my visions of the bike.
This will work with the Uni type foam filters only. Not sure what you can do with the K&N type metal mesh filters...
The idea is to restrict the airflow back down to where it was with the stock airbox; keeping the air/fuel ratio the same as it was. Here's what I did...
I cut up some 16oz beer cans and made a round 'sleeve' to go inside the UNI foam filter. You can mess with the length to get the A/F ratio right. Just stick the aluminum sleeve inside the UNI pod filter and keep trimming the length until you get it right.
My first try, I was running way too rich -not enough air. I just kept trimming a little of the length off until it ran right.
I wasn't looking for a performance increase with the filters, and I didn't want to get into jetting the carbs. I mess with that enough on my dirt bikes. I just wanted a quick and dirty way to get the A/F mixture right. Some might call it 'ghetto', but it worked for me.